Yet another '84-'85 fuel pump weirdness thread. What I mean by that is the fuel pump won't run unless the trailing coil is something something. It's a relay that turns the fuel pump off for safety reasons.
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Originally Posted by Jeff20B' date='Jun 6 2004, 01:29 AM
Yet another '84-'85 fuel pump weirdness thread. What I mean by that is the fuel pump won't run unless the trailing coil is something something. It's a relay that turns the fuel pump off for safety reasons.
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You'd have to see the other forum to understand. It seems to pop up there like once a week.
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Originally Posted by Jeff20B' date='Jun 6 2004, 12:37 PM
You'd have to see the other forum to understand. It seems to pop up there like once a week.
Got the Walbro in place where the old pump was...now for fittings and new hoses. All the hoses under there are exhibiting dry-rot! |
the 84-85 setup works like this: dizzy sends tach signal to ecu, ecu sees it and turns on pump. the 79-83 setup just has the pump connected to the "on" position of the ignition switch
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With the Haltech, am I going to need anything else to make the pump work?
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Originally Posted by Dysfnctnl85' date='Jun 6 2004, 10:11 AM
With the Haltech, am I going to need anything else to make the pump work?
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Originally Posted by j9fd3s' date='Jun 6 2004, 02:42 PM
no, just use the haltech fuel pump wires, thats what they there for
Thanks as always for the help. |
Originally Posted by Dysfnctnl85' date='Jun 5 2004, 06:25 PM
Can I not just get the fittings I need for this pump to hook up to what's already there?
Would it be worth it to run new fuel lines? pump to suck through. The GSL-SE pick up is much larger. The existing steel lines running to the engine compartment are probably ok - if you want to upgrade, just run a new 3/8" line to the front and use the old feed line as the return. You also need to run new wires to the pump - the stock wiring harness isn't up to the job. I've even had problems powering a 6 psi pump for a carb. Use about 12 gauge or so from the battery (fused) to a relay (haltech may have provided one) to the pump. Also don't use the harness ground wire - it's no good either. Just run a wire from the pump ground to a conventient chassis bolt. |
Originally Posted by 83turbo' date='Jun 7 2004, 09:24 PM
The 12A type fuel pick up tube may be too small of a straw for the bigger
pump to suck through. The GSL-SE pick up is much larger. The existing steel lines running to the engine compartment are probably ok - if you want to upgrade, just run a new 3/8" line to the front and use the old feed line as the return. You also need to run new wires to the pump - the stock wiring harness isn't up to the job. I've even had problems powering a 6 psi pump for a carb. Use about 12 gauge or so from the battery (fused) to a relay (haltech may have provided one) to the pump. Also don't use the harness ground wire - it's no good either. Just run a wire from the pump ground to a conventient chassis bolt. |
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